<div class="card" style="width: 100%;">
    <div class="card-header">
        客户端列表
    </div>
    <div>
        <button @click="targetSocketIDClicked" style="width: 100%;" class="btn btn-outline-dark btn-sm"
                v-for="k in clients.keys()" :data-socket_id="k">
            {{getSocketIdLabel(k)}}
        </button>
    </div>
</div>